HTTP Client uses incorrect token after refresh in Duende.AccessTokenManagement.OpenIdConnect
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.
Summary
Duende.AccessTokenManagement.OpenIdConnect is a set of .NET libraries that manage OAuth and OpenId Connect access tokens. HTTP Clients created by `AddUserAccessTokenHttpClient` may use a different user's access token after a token refresh occurs. This occurs because a refreshed token will be captured in pooled `HttpClient` instances, which may be used by a different user. Instead of using `AddUserAccessTokenHttpClient` to create an `HttpClient` that automatically adds a managed token to outgoing requests, you can use the `HttpConext.GetUserAccessTokenAsync` extension method or the `IUserTokenManagementService.GetAccessTokenAsync` method. This issue is fixed in Duende.AccessTokenManagement.OpenIdConnect 3.0.1. All users are advised to upgrade. There are no known workarounds for this vulnerability.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| DuendeSoftware | Duende.AccessTokenManagement | = 3.0.0 | — | No fix listed | CNA |
| — | Duende.AccessTokenManagement.OpenIdConnect (NuGet) | 3.0.0 to before 3.0.1 | 3.0.1 | Patch available | GHSA-7mr7-4f54-vcx5 |
- Duende.AccessTokenManagement VendorDuendeSoftware Affected = 3.0.0 Fixed in — No fix listed CNA
- Duende.AccessTokenManagement.OpenIdConnect (NuGet) Vendor— Affected 3.0.0 to before 3.0.1 Fixed in 3.0.1 Patch available GHSA-7mr7-4f54-vcx5
Remediation
- Fix · GHSA-7mr7-4f54-vcx5 Duende.AccessTokenManagement.OpenIdConnect (NuGet) Fixed in 3.0.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2024-51987
- 2026-10-03 Alias added: GHSA-7mr7-4f54-vcx5
References
Other 4
- https://github.com/DuendeSoftware/Duende.AccessTokenManagement/security/advisories/GHSA-7mr7-4f54-vcx5
- https://github.com/DuendeSoftware/Duende.AccessTokenManagement/commit/09c73e32b182da5c6d7b55ec790cb2271cc4b63f
- https://github.com/DuendeSoftware/Duende.AccessTokenManagement
- https://github.com/DuendeSoftware/Duende.AccessTokenManagement/releases/tag/3.0.1
More DuendeSoftware vulnerabilities
- TI-2025-19557 Duende.AccessTokenManagement race condition when concurrently retrieving customized Client Credentials Access Tokens CVSS 4.0MEDIUM 6.3
- TI-2024-26617 Duende IdentityServer Open Redirect vulnerability CVSS 3.1MEDIUM 4.7
- TI-2024-33222 Duende IdentityServer has insufficient validation of DPoP cnf claim in Local APIs CVSS 3.1LOW 3.1
Sources
- CVE-2024-51987 · CVE Program
- CVE-2024-51987 · NVD
- FIRST EPSS
- GHSA-7mr7-4f54-vcx5 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences